21109721

素因数分解:

${\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{199}}^1$

素因数の和:344

約数の個数: 16

約数和(自身を含む): 22617600

約数和(自身を除く): 1507879

約数列:

[1, 37, 47, 61, 199, 1739, 2257, 2867, 7363, 9353, 12139, 106079, 346061, 449143, 570533, 21109721]

約数ペア:

[(1, 21109721), (37, 570533), (47, 449143), (61, 346061), (199, 106079), (1739, 12139), (2257, 9353), (2867, 7363)]